It has been a couple of years since I’ve done any
large-scale field mowing with the brush mowers. For about 12 years I followed a
planned three year rotation that had me mowing five to seven acres each year.
The sole reason for the mowing was to locate and eliminate trees and shrubs
invading the field. I purchased my first DR field and brush mower in 1992. That
mower, which I refer to as the DR or The Doctor, followed the old Bachtold
Brothers design. The DR was lightweight and would mow practically anywhere, but
only had one speed, moderately slow, and with age its performance began to
decline. In 2009 I purchased the newer model shown above, which I generally referred
to as JR or Junior. JR took over the duties of field mowing while the DR
retired to more lightweight duties.
When I first began mowing fields, I would mow over the
invasive plant and mark the location of the stump using a 4”x5” red plastic
flag mounted atop a 3 foot wire shaft. In the early years I was averaging about
750 flags per acre. Mowing was done in November and December, and I would
return to the fields in April or May to apply glyphosate herbicide to the
developing stump sprouts. This strategy worked extremely well in fields that
were experiencing a heavy infestation of invasive woody plants. In recent
years, most areas of the fields are experiencing invasion rates low enough to
allow me to individually treat the invaders without a wholesale mowing of the
field. Most of my current mowing is done in small isolated areas that still
require a more heavy-handed management approach.
Here is a good example of a small area requiring some
special attention. This long triangular area wedged between an old fence row
and an intermittent Creek has some special needs that are best met by mowing.
This end of the field is crowded with Dwarf Sumac. If left unchallenged, it
would eventually create an impenetrable thicket. The far end of the field was
once a multiflora rose jungle. I use blue flags to call attention to special
features such as holes, rocks, old fence wire, or plants that should be left
untouched. In this case the blue flag identifies a small oak that is to remain
in this field.
The finished product. The mowing does not kill the sumacs.
After two or three mowing seasons they will once again reach the point where
they will need to be knocked back. Managed in this way the sumacs pose no
threat to the tallgrass or other prairie vegetation, but they are still able to
produce food for the various leaf and seed eaters that seem to prefer this
species.
A photo taken from this angle 10 years ago would have shown
nothing but a solid wall of multiflora rose inches from your face. I have many
photos of that type, but they are virtually useless as helpful before photos
for documentation purposes. The massive roses went up to the point where the
light-colored grass begins. Since old seeds continue to sprout to produce new
plants in this location, I mow it at least every other year to help locate the
new multiflora rose plants. The red flags identify young multiflora rose plants
that need to be treated with herbicide. Only eight rose plants were found in
this one third acre field this year. The blue ribbon marks one of several
native rose plants that I am trying to encourage.
The area around the main trailhead is mowed each year. This
is one of only two areas that get such attention on an annual basis.
A mixed bag of invasive shrubs once grew here, but now I
only have to deal with the occasional new recruit. My primary reason for
continuing to mow this small patch is to get rid of the scattered tallgrass
and plant stalks that interfere with enjoying the wildflower displays occurring
here during spring and early summer. The Monarda bloom is especially attractive. The
floral display along with its attendant butterflies should not be sullied by a
mass of year-old stalks and stems.
It’s nice to have reached a point where large-scale mowing
is no longer necessary to achieve my management objectives, but I kind of miss
the activity. It was good exercise and I found it relaxing to spend the day
just walking round and round and round the field. Fortunately, I have plenty of
other work to fill up those hours no longer needed for mowing activities.
Quite the machine you've got there. And good photos to illustrate your work. Pix #3&4 are a great comparison.
ReplyDeleteThanks, Stew.
Delete